Tool-holder.



TOOL HOLDER.

APPLIATION IILED AUG.22, 1913.

1,1 04,980. Patented July 28, 1914.-

www w Z Witnesses lnientor.

M MM by Atto rn eys suitable metal it being possible to construct thecutter or bit of various lengths within practical limits. Thus, when thechannel 11 of the turret Ais alined with the channel 3 of the shank, theshank being disposed within the tool post 4, should the cutter or bit 1Sbe comparatively long, the same may tit snugly `within the channels 3and 11 with its forward end protruding slightly to engage the work orstock. lVhen the binding screw 5 of the tool post is tightened, thesaine will engage the cutter or bit so as to not only clamp the shank lwithin the tool post, but to also clamp the cutter within the channel 8of the shank. The forward end of the cutter Will be clamped within theturret or the channel 11 thereof, by tightening the binding screw 16,which will cause the forward extremity of the cutter to be clampedtightly between the forward end of the lever 13 and the insert 17, itbeing noted that the binding screw i6 in engaging the cutter will alsoserve to clamp the cutter intermediate its forward end and the toolpost. The cutter may thus be clamped at three points. Should a shortercutter or bit be employed, that is, a cutter of a length not sutlicientto extend under the binding screw 5 of the tool post, the cutter may beclam )ed by the forward end of the lever 13 and by the binding screw 16,without the assistance of the binding screw of the tool post. 0r, if thecutter or bit is of a very short length, the same can be clamped betweenthe insert 17 and the forward end of the lever 13, by threading thebinding screw 16 downwardly so as to enga-ge the bottom or' the 'channell1.

lt will thus b manifest that the present holder is designed for use inconnection with various lengths of cutters or bits, Awhich is verydesirable, and which will per# mit a long cutter to be continually useduntil worn out, ln using a cutter or bit of the nature indicated, itwill bejevident that the saine may be ground to shape at its torA wardend, in an easy and convenient manner, but little `@grinding beingnecessary, as compared with the ordinary tool now em ployed. The presentcutter and holder may also be employed with effectiveness for makingheavy cuts iny the work or stock, and is otherwise of advantage as willbe obvious to those versed in the art.

ln employing the turret 6.the cutter or bit must be of a length to liewholly within the channel 11 of the turret, which will permit the turretto be adj usted about its center, by loosenin the nut 9. Thus, asillustrated in Fig. 2, tic cutter may be adjusted angular-lf, whenoccasion may necessitate or dictate, the manner ofclamping the cutterbeing the saine as that above described.

An important advantagev owing from the i particular structure described,resides 1n the,

fact that the cutter may t completely within the relatively deep grooves.of the turret and thans, which is highly desirable, and t'nrtherinore,the lever being pivoted between the ears at the sides of the turretgroove, may swing into or enter the turret groove when the cutter isremoved, or should the cutter be compartively thin, so as to lie belowthe suriace of the turret. In this manner. the cutter may be securelyheld within the groove :if the turret, and may be very effectivelyclamped therein.

As illustrated in Fig. 4, the turret 6 may be locked upon the seat 2 bymeans of a set screw 19 threaded into one side of the seat 2 andengaging an angular or circumferential groove 20 provided in the stem orshank 7 of the turret. Or, as illustrated in Fig. 5, the turret may belocked upon the scat 2, by means of a cotter pin-or key 21 engagedthrough the seat 2 and the shank or stem 7 of the turret. It is evidentthat these or other means may be employed for locking the turret inposition.

in the form illustrated in Figs. 6 and 7, the turret and attendent partsare eliminated, the shank being of approximately the same cross sectionfrom end to end, and having the longitudinal channel or groove 8 in itsupper edge extending from end to end. At the forward end of the channel5l, the shank l is provided with the opstanding ears 122. A lever 13 isdisposed above the forward end portion of the channel 3, and has theupstanding ear or lug 14a pivoted between the ears 12 by meansl of a pinor rivet 15a, a binding or clamping screw 16 being carried by the rearend or extremity lor the lever 13a. The shank 12L is also preferablyprovided with the rear resisting insert 3,71 forming the bottom of theforward end portion of the channel 3B. The cutter or bit 18 may be or"any. desirable length, and is clamped within the channel 3a in themanner stated in connection with the description of Figs. 1, 2 and 3. "n

The advantages oi' several forms of the invention above described, willbe manifest to those versed in the art, and need not be itemized atlength, it being noted that the objects aimed at have been carried outsatisfactorily. For convenience in claimin the invention, the turret 6may be considered a part of the shank 1, when the channel 11 of theturret is alined with the channel of the shank, so that generically, theforms illustrated all resemble each other.

Having thus described the inveutiomwhat is claimed .as new is A toolholder embodying a ymember having a relatively deep upper channel tosnugly receive a cutter therein, and havin a pair of upstanding ears atone end of an Hush withthe sides of the said channel, a. lever disposedabove the channel and having www@ an upstaudng ear at one end pvoted.buetween the sald ears, and a, bndimg screw carried by the other end ofthe lever and arranged. to engagthe bottom of the channel o1' a cutterfitting in Vthe channel, to

clamp the cutter between the first mentioned end of theA lever and 'thebottom, of the channel.

y y m1-1N VALENHNE my.

Witnesses:

M.4 D.. JAYNE, EDWARD STYERS. u

